/Engine/Plugins/Runtime/StateTree/Source/StateTreeModule/Public/StateTreeDelegates.h
Called when parameters of a StateTree State changed. This should mainly used by the asset editor to maintain consistency in the UI for manipulations.
typedef TMulticastDelegate_TwoParams< void, const [UStateTree](API\Plugins\StateTreeModule\UStateTree) &, const [FGuid](API\Runtime\Core\Misc\FGuid) > FOnStateParametersChanged